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(c) Meet the requirements for new construction, including anchoring and elevation <br />requirements for manufactured homes in this subsection. <br />A recreational vehicle is ready for highway use if it is on its wheels or jacking system, is <br />attached to the site only by quick disconnect type utilities and security devices, and has no <br />permanently attached additions. <br />Sec. 39.045. Reserved. <br />Sec. 39.046. Existing structures. <br />(1) Structures and uses of structures which lawfully exist prior to the effective date of this <br />ordinance and which do not conform to this article may be continued subject to the <br />following conditions: <br />(a) In floodway. Existing structures and uses within a floodway shall not be expanded <br />or enlarged unless the effect of proposed expansion or enlargement does not cause <br />an additional increase in floodway elevation during the occurrence of the base <br />flood discharge, as certified by a registered professional engineer. <br />(b) Modifications to existing structure. Any repair, reconstruction or improvement of <br />an existing structure within a floodplain which constitutes substantial <br />improvement shall be undertaken only in full compliance with this article, and the <br />owner shall be required to obtain a floodplain permit before repair, reconstruction <br />or improvement shall begin. <br />Sec. 39.46.1. Access. <br />New development proposals will be designed, to the maximum extent practicable, so <br />residential building sites, walkways, driveways, and roadways are located on land with a <br />natural grade with elevation not less than the base flood elevation and with dry land access. <br />Sec. 39.46.2. Materials Storage. <br />The following uses are prohibited within a designated floodplain: <br />Storage or processing of materials that are hazardous, flammable, or explosive in <br />the identified special flood hazard area. <br />Storage of material or equipment that, in time of flooding, could become buoyant <br />and pose an obstruction to flow in identified floodway areas. <br />Storage of material or equipment not otherwise prohibited shall be firmly anchored to <br />prevent flotation. Dumpsters shall be located in an enclosure designed to withstand <br />flood conditions in accordance with Section 39.041(7), Wet Floodproofing. The <br />enclosure shall be constructed to prevent the dumpster from becoming buoyant and a <br />